Full list of all monsters needed for 100% enemy report in Final Fantasy XIII-2. This is all based on personal experience. Keep in mind that this list WILL contain spoilers about bosses, you have been warned.
This is not a strategy guide on how to defeat certain bosses or monsters, feel free to discuss strategies but none will be added to the list.
The list might contain minor errors such as which monsters you meet in side missions, please contact me if you find any of these. Also, feel free to post tips on how to meet monsters or if you feel a monster should be listed as a semi-rare monster. I require a reasonable reason to change anything.Lastly, this list is to be used on PS3T and PS3T only.

A few things you should know about the bestiary fragment:
You only need to fight a monster once in order to gain it's entry.
You do not need to unlock all data for a monster in order for it to count, simply it being in the bestiary is enough.
Rare monsters can spawn more than once.

Terms used in the list:Purple: Bosses or monsters you will fight in the main story.Green: Monsters you have to fight in side missions.Blue: Monsters that are not classified as rare, but can take longer to spawn compared to normal monsters.Red: Rare monsters that appears as "Voids" when they spawn.

Mind you the boss "Proto fal'Cie Adam" has a special form which you will not encounter, no matter what, in the story. Please refer to it in the list below.

There's also a version of "Caius Ballad" that can be missed (But obtained later with time reversal), refer to Caius Ballad in the list below for more info.

VoidbornGogmagog - Main story boss.Gogmagog - Main story boss.Gogmagog - Main story boss.Aloeidai - Main story boss.

CrystalspawnPacos Amethyst - Main story boss.Pacos Luvulite - Main story boss.

Feral Creature

BeastSilver Lobo - Archylte Steppe -Year Unknown-, you can encounter this near the Nomad Camp when the weather is sunny.Gorgonopsid - New Bodhum -003 AF-Uridimmu - Bresha Ruins -005 AF-Mánagarmr - Academia -500 AF-, If you have trouble finding this monster, then try and get into a fight with a Mimi, Mimi has a chance to summon this.Ugallu - Yaschas Massif -110 AF-Albino Lobo - Bresha Ruins -005-, encountered in the area "Echoes of the Past". - This might not spawn right away.

TerraquaticA general tip for this monster type is that they always spawn near water.Bloodfang Bass - Oerba -300 AF-Breshan Bass - Oerba -300 AF-Hedge Frog - Archylte Steppe -Year Unknown-, can be encountered in the westernmost section of the map when the weather condition is sunny. Note: I seemed to have a bigger chance of it appearing near the edge of the map.Mud Frog - Archylte Steppe -Year Unknown-, can be encountered in the westernmost section of the map when the weather condition is set to rain. Note: I seemed to have a bigger chance of it appearing near the edge of the map.Ceratosaur - Sunleth Waterscape -300 AF-, appears in the southernmost part of the map.Ceratoraptor - Sunleth Waterscape -300 AF-, a rare version of the Ceratosaur, appears in the southernmost part of the map.Spiceacilian - New Bodhum -003 AF-Tabasco Toad - New Bodhum -003 AF-, Rare version of the above. Won't spawn until you finish the main story part in this area.Pitterpatter - Yaschas Massif -100 AF-Chunerpeton - Yaschas Massif -110 AF-

DemonYaksha - Vile Peaks -010 AF-Yakshini - Vile Peaks -010 AF-Gandayaks - Yaschas Massif -010 AF-Vodianoi - Archylte Steppe -Year Unknown-, encountered when the weather is cloudy/sunny at the south part of the map.Shaguma - Vile Peaks -010 AF-, south part of the map.Gahongas - Yaschas Massif -010 AF-Samovira - Archylte Steppe -Year Unknown-, encountered when the weather is cloudy/sunny at the south part of the map. Haguma - Vile Peaks -010 AF-, south part of the map.

ArmadillonNavidon - Archylte Steppe -Year Unknown- Westernmost part of the map when the weather condition is set to rain. Mind you, this is a semi-rare monster and will probably take some time to spawn. Can also appear when it is sunny.Bunkerbeast - Yaschas Massif -100 AF-Calautidon - Sunleth Waterscape -300 AF-, Semi-rare, I met this in the square-ish area where you fight Royal Ripeness.

WyvernSvarog - Bresha Ruins -005 AF-, this appeared to the east of the gate that requires an Eclipse artefact to open.Vouivre - Archylte Steppe -Year Unknown-, this appears in the central/northern part of the map when it is raining, cloudy and sunny. Check area around the Sanatorium if you have problems.Kanna Kamuy - Yaschas Massif -110 AF-Deathgaze - Yaschas Massif -100 AF-, rare monster that will spawn a bit to the north of the map outside the ruins.Illuyankas - Sunleth Waterscape -400 AF-, South part of the map, near the gate.

WoodwraithIf you at any point kill one of these monsters and still miss the others (which you will), then you have to reverse time and go all the way over to the area again for a chance to fight these monsters again.Xolotl - Academia -500 AF- Go to the right at the final area just before the boss. If you have trouble finding this monster, then try and get into a fight with a Mimi, Mimi has a chance to summon this.Miquiztli - Academia -500 AF- Go to the right at the final area just before the boss.Tezcatlipoca - Academia -500 AF- Same as above but semi-rare spawn. If you don't meet this right away, then move away and retry. Do NOT kill the 2 monsters that spawn if this doesn't spawn.

OretoiseLong Gui - Archylte Steppe -Year Unknown- Southeast part of the map when the weather is sunny. This is the only Big Game Hunter boss that doesn't actually require you to have the mission. This boss is required for Big Game Hunter.

FlanFlanbanero - Sunleth Waterscape -300 AF-Seeping Brie - Sunleth Waterscape -400 AF-Flangonzola - Archylte Steppe -Year Unknown- Northern part of the map when the weather condition is set to sunny.Flandit - Sunleth Waterscape -300 AF-Garganzola - A Dying World -700 AF-Miniflan - Sunleth Waterscape -300 AF-Blue Miniflan - Sunleth Waterscape -400 AF- While technicially not related to the main story, it is still unmissable if you do the story part in this area.Yellow Miniflan - Sunleth Waterscape -400 AF- Same as above.Black Miniflan - Sunleth Waterscape -400 AF- Same as above. Pink Miniflan - Sunleth Waterscape -400 AF- Same as above.Mutantomato - Sunleth Waterscape -300 AF-Royal Ripeness - Main story boss.Royal Ripeness - Sunleth Waterscape -300 AF-, this is the version you fight if you decide to fight him without weakening him in the future. Keep in mind he is much tougher.

BehemothFeral Behemoth - Yaschas Massif -010 AF-Greater Behemoth - Augusta Tower -200 AF-Reaver - Archylte Steppe -Year Unknown- Northeast part of the map, near the Long Gui when the weather condition is set to sunny.Zaghnal - Oerba -400 AF-Narasimha - Yaschas Massif -01X AF- semi-rare, seems to spawn a bit north to the map just before the ruins.

SahaginOannes - Sunleth Waterscape -300 AF-Swampmonk - Archylte Steppe -Year Unknown- Western part of the map when the weather is set to rain.Apkallu - Academia -500 AF-Sahagin Prince - Sunleth Waterscape -300 AF-, doesn't spawn until you've cleared the story part in this area.

OchuOchu - Archylte Steppe -Year Unknown-, will appear in the western part of the map when it is raining and you have the mission. This boss is required for Big Game Hunter.Microchu - Archylte Steppe -Year Unknown- Appears in the western part of the map.

CactuarCactuar - Archylte Steppe -Year Unknown- North part of the map when the weather is set to sunny.Giant Cactuar - Archylte Steppe -Year Unknown- Same as above, in order to meet this guy you have to get into a fight with a normal Cactuar. Switch to a Paradigm that can't deal damage and simply wait, the Cactuar will either run away or evolve into Giant Cactuar.Metallicactuar - A Dying World -700 AF- Semi-rare, spawns all over the place.Cactuaroni - Archylte Steppe -Year Unknown- Appears in the north part of the map when the weather is set to rain.Flowering Cactuar - Archylte Steppe -Year Unknown- Appears in the northeast part of the map when the weather is set to sunny.Gigantuar - Archylte Steppe -Year Unknown- You will fight this guy when you click certain Cactuar Statues needed to open the gate to the south.Metal Gigantuar - Archylte Steppe -Year Unknown- Rare monster, Appears to the south if it's raining and in the central area if it's sunny. Generally I seemed to have better luck finding him when it was sunny, another good spot is the Plains of Eternity when sunny.
Stonestump Wastelands Trench (sunny) is another good spot to find this big fella.

TonberryTonberry - Bresha Ruins -300 AF- Reports says that he can spawn all over, I met him in the north part of the map.Don Tonberry - Bresha Ruins -100 AF- Past the north Chocolina going west where there is a ramp leading up seems to be a good hotspot for this fella. Might work for the normal version of Tonberry too.

ChocoboChocobo - Archylte Steppe -Year Unknown- White Chocobo - Oerba -300 AF- Semi-rare, spawns all over the map.Black Chocobo - Vile Peaks -010 AF- semi-rare, spawns in the south part of the map.Blue Chocobo - Archylte Steppe -Year Unknown- Westernmost part of the map when the weather is set to sunny.Red Chocobo - Archylte Steppe -Year Unknown- Southern part of the map when the weather is set to sunny.Green Chocobo - Yaschas Massif -100 AF-, tends to spawn in the north part of the map just before the ruins.Purple Chocobo - Bresha Ruins -300 AF-

Combat EngineerHoplite - Bresha Ruins -005 AF-Testudo - Archylte Steppe -Year Unknown- Fought in the central area when the weather is set to cloudy. Scutari - Archylte Steppe -Year Unknown- Same as above.

CentaurionImmortal - Archylte Steppe -Year Unknown- South part of the map when the weather is set to cloudy and you have the side mission. This boss is required for Big Game Hunter.Centaurion Blade - Archylte Steppe -Year Unknown- Same as above.

BombBomb - Vile Peaks -010 AF-Circuitron - Bresha Ruins -300 AF-Cryohedron - Vile Peaks -010 AF-Cloudburst - Archylte Steppe -Year Unknown- South part of the map when the weather is cloudy. - Took me about 20-30min for it to spawn. Another potential spawn can be found in the ditch/gulch that goes under a bridge in the southern area (northwest of the gate).Tempest - Bresha Ruins -100 AF-Debris - Archylte Steppe -Year Unknown- South part, when the weather is sunny, cloudy and rain.Grenade - Oerba -400 AF-

ArmamentDreadnought - Vile Peaks -010 AF- Spawns in the southeast tunnel, might take a few tries.

Cie'th

The Cie'th that spawns in Archylte Steppe all spawn during the weather condition stormy. And mostly in the southern part of the map. Ispuesteke being the only exception.Shambling Cie'thGhoul - Academia -400 AF-Ghast - Bresha Ruins -005 AF-Strigoi - A Dying World -700 AF-Taxim - Academia -400 AF-Vampire - Archylte Steppe -Year Unknown-, can also meet this guy in the Raspatil fight.Geiseric - Academia -400 AF- Northwest part of the map.Fomoire - Archylte Steppe -Year Unknown- Semi-rare that spawns to the very south during stormy. Another potential spawn spot is to the very west with the same weather condition. Note: Fomoire seems to have a big chance to spawn if you jump down from the plateau where you fight Yomi.Wladislaus - Archylte Steppe -Year Unknown-, can also meet him in the fight with Raspatil.Malebranche - Archylte Steppe -Year Unknown- Spawns to the very south during stormy. Another potential spawn spot is to the very west with the same weather condition.

Unusual Cie'thIspuesteke - Archylte Steppe -Year Unknown- South part of the map when the weather condition is set to stormy, can also spawn in the middle area.Seeker - Oerba -200 AF-

UndyingYomi - Archylte Steppe -Year Unknown- Encountered to the south on top of a rock (need Chocobo to get there) when the weather condition is set to stormy. This boss is required for Big Game Hunter.Zenobia - Story related boss.Vaballathus - Story related.Gorgyra - Yaschas Massif -01X AF- Fought in the south part of the map.Raspatil - Oerba -400 AF- Rare monster, can be met by the stairs near the water. Fighting and defeating this boss in Normal Mode will unlock Fair Fighter.

Special

ProtectorThere are 3 versions of Caius you don't meet in the story, sadly I can't remember exactly which so for now I've just listed them as the 3 lowest.Caius Ballad - Story related boss.Caius Ballad - Story related boss, [5000 HP] It is possible to miss this version of Caius if you lose the fight when Noel fights him alone in A Dying World during normal story progression. If you happened to miss this version, do a time reversal in Academia 4XX and progress through this story part again.Caius Ballad - Story related boss.Caius Ballad - Story related boss.Caius Ballad - Story related boss.Caius Ballad - Fought during the Paradox Ending "Vanille's Truth"Caius Ballad - Fought during the Paradox Ending "Beneath a Timeless Sky"Caius Ballad - Fought during the Paradox Ending "Heir to Chaos"

Fal'Cie
Just like Caius, I'm not really sure which version of Adam that is the special version. I've listed him in the bottom for now.Proto fal'Cie Adam - Story related boss.Right Manipulator - Story related.Left Manipulator - Story related.Proto fal'Cie Adam - Story related boss.Right Manipulator - Story related.Left Manipulator - Story related.Proto fal'Cie Adam - To fight the special version of Adam, you will have to intentionally pick a wrong answer (Everything but 'Scream at Hope'). All of this happens after you defeat the 2nd form of Adam.Right Manipulator - Same as above.Left Manipulator - Same as above.Proto fal'Cie Adam -You fight this version of Adam when you go for the Paradox Ending "Test Subjects"Right Manipulator - Same as above.Left Maniupulator - Same as above.

EidolonChaos Bahamut - Story related bossTwilight Odin - Vile Peaks -200 AF-, is available after a long mission that requires you to go through time to other areas.